Sodium nitrate

  • Chile saltpeter
  • Cubic niter
  • Soda niter
Formula
NaNO3
Structure
Description
Odorless, colorless, transparent crystals, white granules or powder, hygroscopic, deliquescent.
Uses
Manufacture enamels for pottery, nitric acid, sodium nitrite, in matches, catalyst in manufacture sulfuric acid, pickling meats.

Registry Numbers and Inventories.
CAS
7631-99-4
EC (EINECS/ELINCS)
231-554-3
EC Class
oxidizing, harmful, irritant
S 17 24/25
RTECS
WC5600000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
1498
Merck
12,8792
Beilstein/Gmelin
8547 (G)
EPA OPP
76104
Swiss Giftliste 1
G-2603
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
NaNO3
Formula mass
84.99
Melting point, °C
308
Decomposition point, °C
620 - 860
Vapor pressure, mmHg
0.63 (600 C)
Vapor density (air=1)
2.93
Odor Threshold Odor threshold Odorless
Critical temperature
1048
Density
2.26 g/cm3
Solubility in water
815 g/L
Viscosity
0.03 P (250 C)
Refractive index
1.3404
Dipole moment
1.02 D
Dielectric constant
6.85 (18 C)
Thermal expansion
0.000113/K (50 C)
Heat of fusion
15.7 kJ/mol

Hazards and Protection.
Storage
Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with clothing and other combustible materials. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Acids, alcohols and glycols (e.g. butyl alcohol, ethanol, methanol, ethylene glycol), aldehydes (e.g. acetaldehyde, acrolein, chloral hydrate, formaldehyde), amides (e.g. butyramide, diethyltoluamide, dimethyl formamide), amines (aliphatic and aromatic, e.g. dimethyl amine, propylamine, pyridine, triethylamine), azo, diazo, and hydrazines (e.g. dimethyl hydrazine, hydrazine, methyl hydrazine), carbamates (e.g. carbanolate, carbofuran), cyanides (e.g. potassium cyanide, sodium cyanide), dithiocarbamates (e.g. ferbam, maneb, metham, thiram), esters (e.g. butyl acetate, ethyl acetate, propyl formate), ethers (e.g. dioxane, furfuran, tetrahydrofuran (THF)), hydrocarbons (aromatic, e.g. benzene, chrysene, cumene, toluene), halogenated organics (e.g. dibromoethan
Decomposition
Oxides of nitrogen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with combustible materials may cause a fire. Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus (SCBA) to prevent contact with thermal decomposition products. Extinguishing media: Use water only!
Fire potential
Flames up when heated to 540 C.
Hazards
Increases the flammability of any combustible substance.
Combustion products
Yields toxic gaseous oxides of nitrogen when involved in fire.
Health
1
 
Flammability
0
 
 
Reactivity
0
 
 
Special
O

Health.
Poison_Class
4
Exposure effects
Throbbing headache is common. Seizures have been reported following severe intoxication. Behavioral deficits were observed in the adult offspring of rats who received sodium nitrite prenatally.
   Ingestion
May cause irritation of the digestive tract. May cause methemoglobinemia, cyanosis, convulsions, and death. Methemoglobinemia is characterized by dizziness, drowsiness, headache, breath shortness, cyanosis with bluish skin, rapid heart rate and chocolate-brown colored blood. May be harmful if swallowed. Ingestion may produce eye disturbances, deafness, speechlessness, and tetanic convulsions.
   Inhalation
May cause respiratory tract irritation. May cause methemoglobinemia, cyanosis, convulsions, tachycardia, dyspnea, and death.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1498
Response guide
Hazard class
5.1
Packing Group
III
 
USCG CHRIS Code
SDN
 
HS Code
3102 50 90
 
Std. Transport #
4918746
 
IMO Pollution Category
III